cos^(2)52(1)/(2)-sin^(2)22(1)/(2)

cos A=cos^(2)((A)/(2))-sin^(2)((A)/(2))=1-2sin^(2)((A)/(2))=2cos^(2)((A)/(2))-1

Find the value of sin^(2)82(1)/(2^(@))-sin^(2)22(1)/(2^(@))

Find the value of cos^(2)112(1)/(2^(@))-sin^(2)52(1)/(2^(@))

Find the value of cos^(2)112^((1^(0))/(2))-sin^(2)52^((1^(0))/(2)) cos^(2)52^((1^(0))/(2))-sin^(2)22^((1^(0))/(2))

Prove that sin^(2)52 1/2-sin^(2)22 1/2 .

sin ^ (2) 52 (1) / (2) -sin ^ (2) 22 (1) / (2) =

Find the value of cos^(2)112 1/2-sin^(2)52 1/2 .

Prove that: (sin A + cos A)/(sin A - cos A) + (sin A - cos A)/(sin A + cos A) = (2)/(sin^(2)A-cos^(2)A)=(2)/(2sin^(2)A-1)=(2)/(1-2 cos^(2)A) .